Mathematics, 15.07.2019 12:00 luap6897
The amount of time a bank teller spends with each customer has a population mean = 3.10 minutes and standard deviation = 0.40 minute. if a random sample of 16 customers is selected without replacement from a population of 500 customers, a. what is the probability that the average time spent per customer will be at least 3 minutes? b. there is an 85% chance that the sample mean will be below how many minutes?
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